I use a newenvironment to structure my list of symbols and list of abbreviations. In some documents there is only one of them. So I try to count the use of this environment to correct the offset in my list of table, otherwise it would count one or two tables more and start with two or three.
I tried it like this:
\newcounter{tableCounter}
\renewenvironment{theglossary}{\begin{longtable}[l]{@{}p{\dimexpr 2cm-\tabcolsep}p{0.8\hsize}}}{\stepcounter{tableCounter}\end{longtable}}}
\addtocounter{table}{-\value{tableCounter}}
EDIT:
\documentclass[fontsize=12pt,paper=a4,bibliography=totoc,headings=normal, titlepage=true,toc=listof,toc=indent,listof=entryprefix,twoside=false]{scrbook}
\usepackage{gensymb}
\usepackage{placeins}
\usepackage{chngcntr}
\usepackage{enumitem}
\usepackage[nonumberlist,acronym,toc]{glossaries}
\usepackage[autooneside=false,automark,headsepline]{scrlayer-scrpage}
\newcounter{tableCounter}
\counterwithout{table}{chapter}
\newglossarystyle{mylong}{
\setglossarystyle{long}
\renewenvironment{theglossary}{\begin{longtable}[l]{@{}p{\dimexpr 2cm-\tabcolsep}p{0.8\hsize}}}{\end{longtable}}}
%\stepcounter{tableCounter}
\addtocounter{table}{-\value{tableCounter}}
\newglossary{symbolslist}{syi}{syg}{}
\newglossaryentry{symb:R_GAIN}{name={R\textsubscript{GAIN}},description={Gain Resistor\hspace{5mm}[\ohm]},first={Gain Resistor (R\textsubscript{GAIN})},type=symbolslist,sort=R_GAIN}
\newacronym[plural=LED,firstplural=LED,description={Light Emitting Diode}]{LED}{LED}{Light Emitting Diode}
\makeglossaries
\begin{document}
\listoftables
\printglossary[type=symbolslist,style=mylong,title=List of symbols]
\printglossary[style=mylong,type=\acronymtype]
\chapter{Chapter}
Symbol: \gls{symb:R_GAIN}
\newline
Abbreviation: \gls{LED}
\newline
\begin{table}
\centering
\begin{tabular}{|c|c|}
\hline
First & Second \\
\hline
1 & 2 \\
\hline
\end{tabular}
\caption{First table}
\label{tab:First table}
\end{table}
\end{document}
This MWE renders:
How you can see, my list of tables starts with number 3.




\addtocounter{table}{-1}instead of the\stepcounter{tableCounter}? (Untested for lack of an MWE) I somehow feel that there should be a different solution to this problem altogether, though. But I'm not the person to find it, I'm afraid. – moewe May 18 '18 at 09:59\addtocounter{table}{-1}... There also is https://tex.stackexchange.com/a/33414/35864 – moewe May 18 '18 at 11:02\newglossarystyle{mylong}{% \setglossarystyle{long} \renewenvironment{theglossary}{\begin{longtable}[l]{@{}p{\dimexpr 2cm-\tabcolsep}p{0.8\hsize}}}{\end{longtable}\addtocounter{table}{-1}}}(mod line breaks) works for me. – moewe May 18 '18 at 15:23